kami or ke
Akame
Akai sakana is red fish.
Red death
Red in Japanese is "aka" (赤).
ヘアスプレー /he* a su pu rē/ is Japanese for /hair spray'.(*: he is read like in hello , not like in hero.)
赤い犬 (akai inu) would mean "red dog" in Japanese.
"Akai kaze."
akai kage
You may say 'kaminoke' or simply 'kami.'
It was red.
You can say, "She's got red hair!" or "She's got ginger hair!" or "She's got orange hair!"